Steaming or cooking pan, kettle, etc.



Patented July 28, 1925.

:DIRK Lonfnwiix xoHLiviAN', Jn., or nonnanorirr, NETHERLANDS.

` `strEAiviINcf oa COOKING PAN,A 1in/rioni;"n'rc.y

.Application led'Dec'eniberA; 1923. Sera1fNo.`678,463. i

To all u2/0m it may conce/rn.'

Be it known that I, Dimi LoDEwiJK f KOHLMAN, Jr., of Dordrecht, residing at Dordrecht, the Netherlands, have-invented- Vcertain new and useful Improvements in Steaming or Cooking Pans, Kettles,` Etc.,v oi: rwhich the following is a specification.

l The present'invention relates to a steaming or cooking pan7 kettleor other vessel of the type having an inner and an outer pan communicating with each other through perorations in the inner pan.

The invention has for its object to provide an improved device of this kind, in par@ ticular witli'r'eg'ard to bringing' andkeeping .K the Acontents of the inner pan at the desired.-

' uniform temperature. v

"The invention has further for its object 4 to provide an improved construction ol' inner pan Jrior use with combined pans of the above t e.

tu'rtherv object of the invention is to provide the outer pan with an limproved bottom construction.

V A still further object Lof the invention is to provide a cooking orsteaniing pan comprising an outer pan and a plurality of inner pans located one abovethe other.

ln order that the invention may be clearly understood reference is directe'd'to the ac companying drawingsV illustrating various embodiments by way of example.

ig. 1 is partlyv a'section and' partly an Velevation oi a'combined outer and inner `pan' according to the invention.

Fig. 2 shows partly in section and partly' in elevation an outer' pan containing three inner-pans located one above the other.

3 shows a combined pan with iniproved bottom construction Vfor the outer an. f v p Referring to Fig. 1 the outer pan lis connected by means of a beaded edge 2 vto an outer mantle 3.' F rom the said edge 2 the Yinner pan is suspended with its upper edge 4.

The inner pan is provided with a perforated side wall 5 merging into an `unperlt'or'ated circumferential annular bottom por# tion 6. The central portion of the bottom Z "is Vprovided with perforations. Between the annular portion 6 and the central portion oit' lthe bottomy a depending collar 8 is attached t'o :the 4bottom the said collarv divergingvto.

i wards the bottom of the outer pan. The

4sidewall of the inner pan is providedwith an annular flange y9 serving as a support for done 'for emptying the `ing oa is superfluous.

1 the outer cover.

the cover 11 providedl with hole's'lO. The

outer-pan is closed by a cover-12 having'holes 13 therein. Both covers possess handlesand theout'er pan'is-also provided with handles lThe,nf'iantle space communicates through apertures 115 in the outer' and inner pans with the Vspace between the covers 11 'and 12. It

-ipollows `from theabove that the inner-pan has pert'oi'ations in the bottom-7 inside an u np'erterated annular' circumferential' por* tion 6, pei-iterations inthe side wall under 'the cover 11 and perforations 15 in the por tion lofV the4 side; wall located above Ithe coverll.l

Assuming that the inner pan is 4filled with 'potatoes and that the outerfpan contains 'water the' level of which is located somewhat vbelow the-'bottom ofthe' inner pan andvthat ythe whole' -i'sI'JlaC-ed, e. gi, lon a gas burner,

ythen the operation of the pan is as follows:

The steam V:generated after the pan has been heated or some time ascends'an'd isv guided 'partially by the Acollar 8 centrally into the inner pan through the perforations inthe central portion 'ofthe bottom 7. An-

other portion 'of the steamows through fthe annular space vbetwveen the outer and inner pans'7V then through the perforations inthe side wall 5 under` the cover 11 and finally escapes through fthe holes 10V in the inner cover `11 and the holes 13 in the outer cover 12. The steam within the space between the two pans will Valso How through the perforations 15in-the portion ofthe wall of the inner pan locatedfabove Vthe cover 11. In

Athis manner the water will b'e quickly evaporated, during -which'the steam will so act upon the potatoes 'that they are suiiciently pan whereby strain- Vlf/lea'nwhile the hot air obtained by the gas flame has ascended in the mantle space between the mantle 3 and the outer pan and v 'liow's'through the perforations 15 into the space between the two covers. An excess of hot air can escape rthrough the holes '13 in In this way condensation of lsteam"'between inner'and outer pan is v prevented while thefheat generated A'is most advantageously and `completely utilized.`

1t is-'reinarl'r'ed that the conical collar`8 may alsobe Aci another shape; Sometimes a .bead of semicircular` cross section wil-lv suit 'the PUPOS'OHQYDg at the same time a lproper support tor'the innerl ',panlafter it as'b'een taken out.

ing too hot the central portion of the bottom of the inner pan may be unperforated so that the bottom of the inner pan only has 'perforations between an unperforated centralportion and an unperforated circumfereiitial portion.

In Fig. 2 a pan is shown having a single outer pan i8 provided with a mantle 17. ln this outer pan are mounted three inner pans 19', 2O and 2l, mainly corresponding to the inner pan according to Fig. l. The outer Vpan 18 is further provided with supporting annular flanges 22, 23 and 24 secured to its inner wall, from which flanges the inner pans are suspended with their upper edges,k rbeing suitably shapedy to this end. instead ofsupportingflanges for the upper edge of the inner pans a supporting plate 25 may be used resting on a supporting flange 26, on the said supporting plate an inner pan havingpfeet may be placed. The supporting` plate possesses one or more apertures 27 foil the passage of steam. The perforated covyersof the lower and the middle inner pan are reversed andare adapted to receive eventual condensation water. The in antle 17 extends fr in the upper edge of the outer pan 18 downwardly to almost the lower end of this pan so that, a heating space'surrounds the whole pan. The wall of the outer pan 18 is provided with Vopenings 28 kfor heattransmission. Upon the outer pan a cover corresponding. to the 'cover 2 of Figure lv is placed. rEhe operation of the pan will beclear from the drawing after that .which has been stated in connection with the pan according tojFig. l.

ln F ig. 3 the outer pan 29 has no mantle? while the inner pan is indicated by `30. ln

this embodiment the bottom of the outer panlias a recessed portion in the form of an annular gutter and this gutter surrounds a flat iinperforated central bottom portion ift goes without sayingl that without departing from the principle of the vinvention the bottom may also be shaped otherwise, e. g., be provided with'two or more concentric gutters or be corrugated. The bottom could also be provided with a large number of small concave portions. .in general terms the bottom is characterized by portions located at lower and higher levels. The lower portions are used for receiving` the water. When a bottom of this kind is heated then` at the place of thev portion or portions not in contact with the water the steam formed by the evaporation of the water will be superheated, which isadvantageous for the steaming process. Moreover the bottom portion or portions receiving the water may be of such predetermined volume that it constitute a measure for the quantity of wat-er required in a certain case. p if desired. the outer pan may have vertical passages into which the flames ofthe heat source can enter so that in this way the heat source is utilized most eifectively. The said passages may be narrower at lthe top and grow wider gradually downwardly. rllhe'outei' pan may7 e. g., be rectangular in cross section and a passage may then be provided at each corner. y v

lHaving now particulary described and ascertained the nature of my said invention what claim as new and desire tosecure by Letters Patent is: i Y l. Steaming or cooking pan comprising an inner and an outer pan communicating with veach other by perforations in the inner pan, a mantle surrounding the outer lpan and perforations in the wall of the outer pan and of the inner pan, a cover with perforations for the outer pan, a cover for the inner pan supported upon supporting means located below the upper edge of the inner pan, perforations in the wall portion of the inner ian below the said cover and perforations in thev wall portion of the in ner pan above the said cover. f

2. A steaming or cooking vessel comprising an outer pan; an inner pan supported in said outer pan, said inner panhaviiig perforations therein to' form communicating passages between said pans; anda cover for said inner pan adapted to seat below the upper edge of said inner pan to thus form a perforated wall portion above the cover.

3. A. steaming or cooking vessel comprising f i outer pan; a perforated inner pan supported on vthe upper edge of said outer pan; and a covervfor said inner pan adapted to seat belew the upperpedge of said inner pan to ythus form a perforated wall portion above the cover.

e. steaming or cooking vessel comprising an outer pan; a perforated inner pan supported in said outer pan, said inner pan having an annular flange below the upper edge thereof; and a cover adapted to seat on said annular flange thus forming a perforated wall portion above the cover.

5. A steaming or cooking vessel comprising an outer pan; a perforated inner pan flange thus forming a perforated wall portion above the cover. l

6. A steaming or cooking vessel comprising an outer pan; a perforated inner pan .supported on the upper edge'of said outer pan, said inner pan having a bottom portion comprising an imperforated annular portion surrounding a perforated central portion; and a cover for said inner Hpan adapted to seat-below the upper edge of said inner pan to thus form a perforated well portion above the cover. f

7. A steaming or cookingvessel compris- Y ing an outer pan; an inner 'pan supported in said outer pan7 said inner pan having perfor-ations therein;l av cover for said inner pan adapted to seat belowthe upper edge of said inner pan to thus form aV Wall portion above the cover; and a mantle surrounding the side of the outer pan.

8. A steaming or cooking vessel comprising an outer pan; an inner panl supported in said outer pan,lsaid inner pan having` perforationsl therein to form communicatingV passages between said pans; a cover f or'said inner pan adapted to seat below the upper edge of said inner pan to thus form a perforated wall portion above the cover; and a mantle surrounding the side ofthe outer pan.

9. A steaming or cooking vessel comprising an outer pan; a perforated inner pan said innerpan to thus form a perforated wall portion above the cover; and a mantle surrounding the side of the outer pan and secured thereto at the upper edge.

11. A steaming or cooking vessel comprising an outer pan; a perforated inner pan supportedon the upper edge of said outer pan; a coverfor said inner pan adapted to seat below theupper edge of said inner pan to thus form a perforated wall portion above the cover; a mantle surrounding the side of the outer pan; and a second` cover i for the vessel adapted to seat on the upper edges of .said pans. l2. A steaming or cooking vessel comprising *a perforatedpan having an annular flange in the side thereof below the upper edge; afcover adaptedI to seat on said flange ofthe pan for forming a perforated wall portion above the cover; and a second cover adapted to seat on the upper edge of the side of said pani.

413.V A steaming or cooking vessel comprising an outer pan; a perforated inner'v pan supported on the upper edge of said-outer 1 pan, said inner pan having a/bottom portion comprising an imperforated annular portion surrounding a perforated central portion; a cover forsaid inner pan adapted to seat below the upper edge of said inner pan to thus form a perforated wall portion above the cover; and means-on the bottom portion of the ,inner pan for directing the` vapors to the perforated central portion of said bottom portion. l

le. A steaming or cooking vessel comprising an outer pan; a perforated inner pan supported on theupper edge of said outerv pan7 said inner pan having a bottom portion.A comprising an imperforated annular portion surrounding a perforated central portion; a cover for saidinner pan adapted to seat below the upper edge of said inner pan to thus form a perforated Wall portion above the cover; and a collar secured to the bottom portion of the inner pan for directing the vapors to thel perforated central portion of said bottom portion.

15. An inner pan for a steaming or cool;- ing vessel comprising a perforated pan'having an annular flange in the side thereof :below the upper edge; and a cover adapted to seat onl said flange ofthe perforated pan for forming a perforated wall portion above the cover.

16. An inner pan for asteaming or cooking vessel comprising a perforated pan having a supporting meanspat the side thereof p below the upper edge; and a cover adapted to seat on said supporting -means of the Y perforated pan for forming a perforated wall portion above the cover. y

In testimony whereof I affix my signature. l

DIRK LoDnwIJK KOHLMAN, JR. 

